Finding the odd man out from the given alternatives is a very common type of questions that one comes across in different competitive examinations. In the questions on odd man out, all the items - except one - follow a certain pattern (in their formation) or belong to a group. The item that does not follow the pattern or does not belong to the group has to be marked as the answer choice.
The problems of this variety often fall under the category of Classification. When a given set of elements is classified under a single head, one of the items will not have the common property, which the others will have. Hence it becomes the odd man out.
Questions on classification can be asked in any form. Some of the commonly asked ones are given below.
(1) Alphabet classification: in this type, a group of jumbled letters typically consisting of three letters, ( but can be four or two or a single word ) are put together. The pattern or order in which they are grouped is to be studied and we need to find out which groups have the same pattern or relationship between the letters. There will be one choice, which will have a different pattern from the rest and that is our answer.
Worked out examples:
1. Find the odd one among the following.
(A) ZW (B) TQ (C) SP (D) NL
Solution: Choice - 'D' is following a different pattern.
2. . Find the odd one among the following.
(A) CFD (B) GJH (C) KNM (D) JMK
Solution: Among above options 'C' is different with other options. A, B and D following a similar pattern.
(2) Word Classification: Here, different items are classified based on common properties like names, places, professions, parts of speech, etc., A few examples are illustrated below.
Worked out examples:
3. Find out the odd one among the following.
( A) Mercury. (B) Moon.
(C) Jupiter. (D) Saturn.
Solution: All others except Moon are planets where as Moon is a satellite.
(3) Number Classification :
In this case, we need to choose the odd number from the given alternatives. The numbers may belong to a particular set, I.e., they may be odd, even, prime, rational, squares or cubes only one of the choices will not follow the rule which others do and that is our answer. A few illustrations are given below.
Worked out Examples:
4. Find the odd one among the following.
(A) 17 (B) 27 (C) 37 (D) 47
Solution: All the given numbers except 27 are prime numbers whereas 27 is a composite number. Choice - B
The problems of this variety often fall under the category of Classification. When a given set of elements is classified under a single head, one of the items will not have the common property, which the others will have. Hence it becomes the odd man out.
Questions on classification can be asked in any form. Some of the commonly asked ones are given below.
(1) Alphabet classification: in this type, a group of jumbled letters typically consisting of three letters, ( but can be four or two or a single word ) are put together. The pattern or order in which they are grouped is to be studied and we need to find out which groups have the same pattern or relationship between the letters. There will be one choice, which will have a different pattern from the rest and that is our answer.
Worked out examples:
1. Find the odd one among the following.
(A) ZW (B) TQ (C) SP (D) NL
Solution: Choice - 'D' is following a different pattern.
2. . Find the odd one among the following.
(A) CFD (B) GJH (C) KNM (D) JMK
Solution: Among above options 'C' is different with other options. A, B and D following a similar pattern.
(2) Word Classification: Here, different items are classified based on common properties like names, places, professions, parts of speech, etc., A few examples are illustrated below.
Worked out examples:
3. Find out the odd one among the following.
( A) Mercury. (B) Moon.
(C) Jupiter. (D) Saturn.
Solution: All others except Moon are planets where as Moon is a satellite.
(3) Number Classification :
In this case, we need to choose the odd number from the given alternatives. The numbers may belong to a particular set, I.e., they may be odd, even, prime, rational, squares or cubes only one of the choices will not follow the rule which others do and that is our answer. A few illustrations are given below.
Worked out Examples:
4. Find the odd one among the following.
(A) 17 (B) 27 (C) 37 (D) 47
Solution: All the given numbers except 27 are prime numbers whereas 27 is a composite number. Choice - B
Exercise:
1. A. Iran: Asia b. Canberra: Australia c. Norway: Europe d. Algeria:
Africa
Ans: (b)
Explanation : In all other pairs, second is
continent to which the Country denoted by the first belongs.
2. A. Scapel : surgeon b. chisel:
soldier C. awl: cobbler d. Knife:
chef
Ans : (b)
Explanation: In all other pairs, first is
tool used by the second.
3. a. Mulder: Proteins
b. curie: radium
c. Becquerel: radioactivity d.
Einstein: television
Ans: (d)
Explanation : In all other pairs, first
is name of o scientist who discovered the second.
4 .a. Sheep: bleat b. Horse: neigh c. Ass:
grunt d. Owl: hoot
Ans: (c)
Explanation : In all other pairs second one is
the sound made by the first.
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